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Erosion Equations
INTERRILL EROSION
Upland erosion can be divided into major components, rill and interrill (Lane et al., 1987). Interrill erosion is due to detachment and transport by raindrop impact and overland flow. Interrill erosion has been shown to be approximately proportional to the square of the rainfall intensity (Foster et al., 1976; Watson and Laflen, 1986; Meyer and Harmon, 1984). In the WEPP simulation model (Lane et al., 1987), interrill detachment is modeled as:
In addition to rainfall intensity, interrill erosion is related to slope. In a laboratory study, Singer and Blackard (1982) compared the erosion rate for two different slopes. Watson and Laflen (1986) presented data from an experiment designed to quantify the effect of rainfall intensity and plot slope on interrill erosion of field plots. Lattanzi et al. (1974) compared interrill erosion for different slope and mulch rates. Foster et al. (1976) presented a conceptual model showing that at lower slopes, interrill transport limited erosion, and that at higher slopes, raindrop detachment limited interrill erosion. A study of the literature relating interrill detachment to slope (Lattanzi et al., 1974; Meyer and Harmon, 1987; Singer and Blackard, 1982; Watson and Laflen, 1986) combined with data collected as part of this experiment (Liebenow, 1989), led to an interrill detachment equation in the form:
Erosion Equations
INTERRILL EROSION
Upland erosion can be divided into major components, rill and interrill (Lane et al., 1987). Interrill erosion is due to detachment and transport by raindrop impact and overland flow. Interrill erosion has been shown to be approximately proportional to the square of the rainfall intensity (Foster et al., 1976; Watson and Laflen, 1986; Meyer and Harmon, 1984). In the WEPP simulation model (Lane et al., 1987), interrill detachment is modeled as:
In addition to rainfall intensity, interrill erosion is related to slope. In a laboratory study, Singer and Blackard (1982) compared the erosion rate for two different slopes. Watson and Laflen (1986) presented data from an experiment designed to quantify the effect of rainfall intensity and plot slope on interrill erosion of field plots. Lattanzi et al. (1974) compared interrill erosion for different slope and mulch rates. Foster et al. (1976) presented a conceptual model showing that at lower slopes, interrill transport limited erosion, and that at higher slopes, raindrop detachment limited interrill erosion. A study of the literature relating interrill detachment to slope (Lattanzi et al., 1974; Meyer and Harmon, 1987; Singer and Blackard, 1982; Watson and Laflen, 1986) combined with data collected as part of this experiment (Liebenow, 1989), led to an interrill detachment equation in the form: